Blockland Appears to Be Damaged?

[Pengie]

When I start up Blockland I get this message (can't print screen for some reason)
"Your Blockland installation appears to be damaged"

Is there anyway to fix it without reinstalling? If I reinstall will I lose all my saves?

[Ad Bot]

[Big Brother]

When I start up Blockland I get this message (can't print screen for some reason)
"Your Blockland installation appears to be damaged"

Is there anyway to fix it without reinstalling? If I reinstall will I lose all my saves?

Reinstall, I'm pretty sure it gives you the option to keep your saves. i lost all mine :C